Once in a while I'll be driving behind a classic car and all I can think of is "how the heck did we survive when every car made that kind of stink?" I grew up

Once in a while I'll be driving behind a classic car and all I can think of is "how the heck did we survive when every car made that kind of stink?" I grew up in the 80s, when catalytic converters were a thing but cars were generally still carb'd, and it was bad enough then. > 56 years That makes me feel old, BTW. My brother and I have a project car we share and it is almost exactly that old (Chevy Nova). It definitely isn't doing any favors for the climate, but it doesn't get driven much.